【报Bug】H5 ios12.0 uni.request请求失败，errMsg:request:fail 其实的正常12版本的就不行

示例代码：

uni.request({  
            url: url,  
            method,  
            header: this.getHeader(url),  
            data: postData,  
            sslVerify: false,  
            success: async (res) => {  
                if (res.data.status == -1) {  
                    let userInfo = {  
                        uid: 0,  
                        login: false,  
                        token: ''  
                    }  
                    fun.saveData("userInfo", userInfo);  
                    store.dispatch("setUserInfo", userInfo)  
                    fun.tips("登录失效，重新登录")  
                    setTimeout(() => {  
                        fun.gotologin()  
                    }, 1500)  

                }  
                callBack(res.data);  
            },  
            fail(res) {  
                console.log('web fail:' + JSON.stringify(res));  
                if (fail_callBack != undefined) {  
                    fail_callBack(res);  
                } else if (res.errMsg.indexOf("request:fail timeout") != -1) {  
                    uni.hideLoading();  
                    uni.showModal({  
                        title: '提示',  
                        showCancel: false,  
                        content: '请求超时，请重载'  
                    })  
                }  
            }  
        });

操作步骤：

uni.request({  
            url: url,  
            method,  
            header: this.getHeader(url),  
            data: postData,  
            sslVerify: false,  
            success: async (res) => {  
                if (res.data.status == -1) {  
                    let userInfo = {  
                        uid: 0,  
                        login: false,  
                        token: ''  
                    }  
                    fun.saveData("userInfo", userInfo);  
                    store.dispatch("setUserInfo", userInfo)  
                    fun.tips("登录失效，重新登录")  
                    setTimeout(() => {  
                        fun.gotologin()  
                    }, 1500)  

                }  
                callBack(res.data);  
            },  
            fail(res) {  
                console.log('web fail:' + JSON.stringify(res));  
                if (fail_callBack != undefined) {  
                    fail_callBack(res);  
                } else if (res.errMsg.indexOf("request:fail timeout") != -1) {  
                    uni.hideLoading();  
                    uni.showModal({  
                        title: '提示',  
                        showCancel: false,  
                        content: '请求超时，请重载'  
                    })  
                }  
            }  
        });

预期结果：

走success函数

实际结果：

走fail函数